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[Thad]

Once it's completed, yes

 

Or you could just get it started and export it. Then edit in Excel as you build upon it.

[Chipmakr]

I have seen dramatic differences in the quality of the calculated tool path motion by doing nothing but switching to surfaces from a solid. These are typically on pretty intricate aerofoil type shapes, but I have had lifts and slight gouges that can be seen in backplot and verify that have completely gone away by changing only this. If I could get the same result with the solid I had to crank down the tolerance 5x to 10x smaller to get there and then suffer the prolonged calculation times.